Tierney is a distinctive girls' name in England & Wales, ranking #618 in 1997 with 41 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 115.8%. In 1997, approximately 1 in every 7,151 girls born was named Tierney. FALLING Recent data shows the name is currently falling.